U.S. stocks opened lower Black Friday as early Thanksgiving and Black Friday sales numbers began coming in. Even the worst day for the Shanghai Stock Market since August wasn't enough to bring down Wall Street. Adobe, which monitors 4,500 websites, says $1.7 billion was spent in the 24 hour period of Thanksgiving. Walmart (WMT) says 25 million people visited its stores or shopped online or mobile on Thanksgiving day. It says it sold an iPad every second on Thanksgiving day. Walmart says video games and systems, televisions, movies and toys have been the top sellers. Kalebios Pharma (KBLI) stock surged 83% in early trading Friday as the CEO says he will not lend stock to short sellers. Bankrate.com says 39% of Americans plan to buy holiday gifts with cash this year, about the same as last year. Oil prices resumed the downward trend after jumping this week on increased tension in the Middle East.